4+7y+20
5x-3x+8
5n+6-8n-2-3n
n+3.14+2n-1/2*3.14
-2.5x+9+1.4x+0.6
9d+2a-(-6a)+3d-15d
2007-04-30 14:22:27 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
4 + 7y +20 combine like terms
24+ 7y
5x-3x+8
2x+8
5n + 6 - 8n - 3n
-6n+6
n + 3.14 + 2n -1/2 * 3.14 PEMDA
n + 3.14 +2n - 4.71
3n - 1.57
-2.5x + 9 + 1.4x + 0.6 Combine like terms
-1.1x + 9.6
9d + 2a + 6a + 3d - 15d
-3d + 8a
2007-04-30 14:35:30 · answer #1 · answered by Kristenite’s Back! 7 · 1⤊ 0⤋
This is an exercise in combining like terms.
7y is one term, and 4 and 20 are like terms
So the answer is 7y + 20 + 4, or 7y + 24
5x - 3x = 2x and add the 8
5n - 8n - 3n is -6n ; 6 - 2 is 4. Combine these for the answer.
The next one you figure the n's. The last part is 3.14 - 1.57, or 1.57
1.4x - 2.5x for first part (do the subtraction) ; 9 + 0.6 for second part (do the addition).
Combine all "d" terms, which will be NEGATIVE, then 2a -(-6a) will be POSITIVE. (Remember how signs work)
2007-04-30 21:45:02 · answer #2 · answered by Don E Knows 6 · 0⤊ 0⤋
are these equations? meaning all are equal to zero? i'l help you please IM me.
2007-04-30 21:27:25 · answer #3 · answered by hacker_lexy 3 · 0⤊ 0⤋